Lobe

In telecommunication, the term lobe has the following meanings:

1. An identifiable segment of an antenna radiation pattern.

Note: A lobe is characterized by a localized maximum bounded by identifiable nulls.

2. A pair of channels between a data station and a lobe attaching unit, one channel for sending and one for receiving, as seen from the point of view of the attached data station.

Source: from Federal Standard 1037C